不同镀层重量的铝硅镀层加热时的镀层结构转变规律

doi:10.13251/j.issn.0254-6051.2022.10.041

金属热处理 ›› 2022, Vol. 47 ›› Issue (10): 238-245.DOI: 10.13251/j.issn.0254-6051.2022.10.041

不同镀层重量的铝硅镀层加热时的镀层结构转变规律

周世龙¹, 叶盛薇², 邓璐璐³, 邓宗吉¹, 卢茜倩¹, 郑笑芳¹

1.马鞍山钢铁股份有限公司技术中心, 安徽马鞍山 243000;
2.神龙汽车有限公司, 湖北武汉 430000;
3.泛亚汽车技术中心有限公司, 上海 201201

收稿日期:2022-04-14 修回日期:2022-07-27 出版日期:2022-10-25 发布日期:2022-12-15
作者简介:周世龙(1988—),男,工程师,硕士,主要研究方向为高强钢及先进镀层开发, E-mail:867392949@qq.com

Coating structure transformation law of Al-Si coating with different coating weight during heating

Zhou Shilong¹, Ye Shengwei², Deng Lulu³, Deng Zongji¹, Lu Qianqian¹, Zheng Xiaofang¹

1. Technology Center, Maanshan Iron & Steel Co., Ltd., Maanshan Anhui 243000, China;
2. Dongfeng Peugeot Citroen Automobile Company Ltd., Wuhan Hubei 430000, China;
3. Pan Asia Technical Automotive Center Co., Ltd., Shanghai 201201, China

Received:2022-04-14 Revised:2022-07-27 Online:2022-10-25 Published:2022-12-15

摘要/Abstract

摘要： 采用扫描电镜和能谱分析仪研究了不同镀层重量的铝硅镀层热成形钢经不同温度和时间加热后的镀层结构转变规律。结果表明,不同重量的铝硅镀层在完全合金化后的镀层结构相同,由基体至表面依次为扩散层、Fe-Al层、Fe-Al-Si层和Fe-Al表面层;随着加热的进行,Fe-Al-Si层和扩散层逐渐增厚,Fe-Al-Si层中Si含量逐渐降低,厚镀层AS150未出现镀层层数减少的现象,薄镀层AS40、AS80出现镀层层数减少的情况。综合考虑铝硅镀层热成形钢加热后的镀层结构、性能变化和产品使用要求,对于1.4 mm厚22MnB5钢基板,薄镀层AS40、AS80的优选热处理工艺为900~930 ℃×3~6 min,厚镀层AS150的优选热处理工艺为900~930 ℃×4~6 min。

关键词: 热成形钢, 铝硅镀层, 镀层重量, 镀层结构, 加热

Abstract: Microstructure transformation low of Al-Si coating with different coating weight on hot forming steel after heating at different temperatures for different time was studied by means of SEM and energy spectrum analysis. The results show that the structure of the fully alloyed Al-Si coating with different weight is the same, which is composed of diffusion layer, Fe-Al layer, Fe-Al-Si layer and Fe-Al surface layer from substrate to surface. With the heating going on, the thickness of the Fe-Al-Si layer and the diffusion layer gradually increases, and the Si content in the Fe-Al-Si layer gradually decreases, meanwhile, the thick coating AS150 does not appear the reduction in the number of coating layers, while the thin coatings AS40 and AS80 appear the reduction in the number of coating layers. Considering the coating structure, properties change and the using requirements of Al-Si coating on hot-forming steel, when using 22MnB5 steel with thickness of 1.4 mm as the base material, the optimal heating process for the thin coating AS40 and AS80 is heating at 900-930 ℃ for 3-6 min, and for the thick coating AS150 is heating at 900-930 ℃ for 4-6 min.

Key words: hot forming steel, aluminum-silicon coating, coating weight, coating structure, heating

中图分类号:

TG156.34

周世龙, 叶盛薇, 邓璐璐, 邓宗吉, 卢茜倩, 郑笑芳. 不同镀层重量的铝硅镀层加热时的镀层结构转变规律[J]. 金属热处理, 2022, 47(10): 238-245.

Zhou Shilong, Ye Shengwei, Deng Lulu, Deng Zongji, Lu Qianqian, Zheng Xiaofang. Coating structure transformation law of Al-Si coating with different coating weight during heating[J]. Heat Treatment of Metals, 2022, 47(10): 238-245.

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不同镀层重量的铝硅镀层加热时的镀层结构转变规律

Coating structure transformation law of Al-Si coating with different coating weight during heating

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